You can use the following keyboard shortcuts for selecting objects in the Viewer window.
| Action | Keyboard Shortcut | 
|---|---|
| Hide selection | Shift-H | 
| Hide all | Shift-H with no selection | 
| Show selection | Ctrl-H | 
| Show all | Ctrl-H with no selection | 
| Select/deselect | Spacebar-click | 
| Toggle selection | Spacebar-click and drag | 
| Select | Click | 
| Add to selection | Ctrl-Shift-click | 
| Remove from selection | Ctrl-click | 
| Select all in group | G-click | 
| Add group to selection | Ctrl-Shift-G | 
| Select object and children | Spacebar-right-click | 
| Select root of hierarchy | Ctrl-right-click | 
| Select object and parents | Shift-right-click | 
| Select whole hierarchy | Ctrl-Shift-right-click | 
| Go up the hierarchy (parent) | Up arrow | 
| Go down the hierarchy (first child) | Down arrow | 
| Go sideways in the hierarchy (left sibling, same level) | Left arrow | 
| Go sideways in the hierarchy (right sibling, same level) | Right arrow |